1. 38.1 Food and Nutrition

2. Calorie Amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius.

3. Carbohydrate Compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body.

4. Fat Lipid; made up of fatty acids and glycerol; protects body organs, insulates body, and stores energy in the body.

5. Protein Macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes.

6. Vitamin Organic molecule that helps regulate body processes.

7. Mineral Inorganic nutrient the body needs, usually in small amounts.

8. Key Concept The nutrients that the body needs are water, carbohydrates, fats, proteins, vitamins, and minerals.

9. Key Concept Every cell in the human body needs water because many of the body’s processes, including chemical reactions, take place in water.